Pharmacology MCQs- 296

Q- Drug-to-drug interaction based on absorption, transformation, distribution and excretion is considered which one of the following types of interaction?

A- Chemical interaction

B- Pharmaceutical interaction

C- Pharmacodynamic interaction

D- Pharmacokinetic interaction

D- Pharmacokinetic interaction- Pharmacokinetics of a drug is related to the drug’s absorption, transformation, distribution and excretion while pharmacodynamics deals with receptors, cells, enzymes and organs.

Q- The effect of medications on parasympathetic function declines slowly in which one of the following organs?

A- Eye

B- Glands

C- Heart

D- Smooth muscles

A- Eye- It is clear that the effect of drugs such as atropine on parasympathetic receptors declines very slowly on the eye more than other organs.

Q- Which one of the following antihypertensive medications is directly acting vasodilator?

A- Clonidine

B- Enalapril

C- Labetalol

D- Nifedipine

D- Nifedipine- It is a calcium-channel blocker that affects the blood vessels directly and leads to vasodilation. The other drugs act indirectly through receptors.

More Pharmacology MCQs

Read The Topics on First Aid USMLE Step 1 

Leave a Comment